Plotting Two Points using vpython (Glowscript)

Our objective is to plot two points on a graph and to learn how to use vpython.

Fig 1. Two points. Point 1: (2,4) and Point2: (6,7).

You will then draw a straight line between the two points, and then extend the line to the y-axis.

Notes and Code Outcome

Create the first point at (2, 4): Create a sphere object with a variable name "p1" and two properties: the position is at the coordinate (2, 4), and the radius is 0.25 units.


              p1 = sphere(pos=vec(2,4,0), radius=0.25)

Add axes so you can see where things are. To draw lines you use a curve object and give the coordinates of points that will be connected by straight lines. The positions of the points are given in an array.


              p1 = sphere(pos=vec(2,4,0), radius=0.25)

              axes = curve(pos=[vec(0, 10, 0), vec(0, 0, 0), vec(10,0,0)])

Now add the second point at (6, 7)

Draw a line between the two points.

Show Notes ▼

You can use the position property (.pos) of the points to set the end points of the line.


                p1 = sphere(pos=vec(2,4,0), radius=0.25)
                p2 = sphere(pos=vec(6,7,0), radius=0.25)

                axes = curve(pos=[vec(0, 10, 0), vec(0, 0, 0), vec(10,0,0)])

                line = curve(pos=[p1.pos, p2.pos])

Plot a point halfway between the two points (the midpoint).

Extend the line between the two points so it intercepts the y-axis.

Plot the following x and y values, and determine if the relation is a function.

x	y
2	4
-3	1
5	-3
4	7
0	3
-1	-1
-2	3
-3	-3
6	2
-7	-2